This paper examines the determinants of family migration from a post-socialist country, the former German Democratic Republic (today, the eastern part of reunified Germany), to a western country, West Germany. The paper seeks to answer the following questions: (1) How does the migration behavior of married and cohabitating men and women differ from that of individuals who live alone? (2) What factors influence family migration? (3) Are there gender-specific differences in the factors that influence migration? Hypotheses are derived from theories of gender roles, household economics, and bargaining to investigate the migration of individuals and families. Data from the Socio-Economic Panel Study covering the period 1992 to 2007 are analyzed using logistic hierarchical regression models. The results show that the male partner's education level is the most important determinant of migration, whereas the female partner's education is of secondary importance. The results generally support the predictions of gender role theory. Despite their egalitarian views and socialization in a socialist country, couples from East Germany exhibit a traditional orientation toward gender roles when making migration decisions.